Deuterium permeation in polycrystalline nickel pre-implanted with nickel and helium ions

The interaction between deuterium and irradiation defects in nickel is studied using the gas-phase permeation technique. Irradiation defects were introduced using 90 keV Ni+ ions with fluences of 1014−1017 ions cm−2, or 30 keV 4He+ ions with fluences of 1015−5 × 1016 ions cm−2. Permeation results show that crystalline defects such as dislocation loops produce no measurable effect on deuterium permeation in the temperature range 370–570 K. By …